(Updated) Rural India might not seem a likely place to study the roots of gender differences in math performance. But a new study of two tribes living in the northeast of the country offers intriguing evidence that biology alone …

If you struggled through high school algebra, you probably thought you simply weren’t born good at math. You might have been right, at least according to a new study by Johns Hopkins University psychologists that suggests that math ability is linked to your inborn “number sense.”